Teams - store validation for external functionnality

Question

Hello,

Your guidelines state I have to add a Pop-out icon when I present a button to the user that will take it to a website.

"Add Pop-out icon to let the users know that they're being navigated outside Teams. You can use the pop-out icon

to the right of the link. [Mandatory Fix]"

And with adaptive cards "Add a note in Adaptive Card that states that when users select Get Help using this app, it takes the user outside Teams."

My button is inside an adaptive card. Do you have a set of icons like the one showed previously and native to Teams, so I can use it? If not what icons do you recommend for such case? The icon has to handle light and dark theme!
Also, it's not possible to put the icon on the right side of the link.

You say we can use a "note" but it would be ugly inside the card. Do you have a good practicve ?

Thanks